2:3 pulldown is a technology that compensates for the different frame rates between film (24 frames per second) and TV (30 fps).
Progressive Scan is a technology that "paints" all of the TV picture in one fell swoop, rather than in two attempts. It makes for smoother viewing. That's why a 720P picture can actually look "better" than a 1080i picture, despite there being fewer "lines".
It's also why most progressive scan DVD players provide a better picture than a non-progressive scan...
FAQ - What's 2:3 Pulldown and Progressive Scan
Progressive Scan is a technology that "paints" all of the TV picture in one fell swoop, rather than in two attempts. It makes for smoother viewing. That's why a 720P picture can actually look "better" than a 1080i picture, despite there being fewer "lines".
It's also why most progressive scan DVD players provide a better picture than a non-progressive scan...
FAQ - What's 2:3 Pulldown and Progressive Scan